The answer would be the B,C and D.
<span>B. The Sui dynasty reunited China in the sixth and seventh centuries by combining existing laws into a single legal code
C. The Grand Canal was constructed to unite northern and southern China.
D. The Sui united northern and southern China, but the new empire was too big to govern effectively.</span>
The answer is B. Scientists study artifacts they discover to form ideas on what life was like in the past. Sometimes there will pieces that doesn't make sense and so they study some more until it makes sense.
In the morning with the first rays of the sun, the peasant woke up in his small house, which was in a small village consisting of 11 courtyards. A big friendly peasant family gathered at breakfast: A peasant with his wife, 4 daughters and 6 sons. Having prayed, they sat down for wooden benches. At breakfast, there were grains cooked in a pot, on a home hearth. After breakfast peasant should work to provide food to the knights and nobles.
Almost all the children of the peasant have already worked as adults. Only the youngest son, who barely passed 5 years, could only graze geese. The harvest was in full swing. All day peasant with his family worked in the field, making only one break for lunch. In the evening they came home very weary. After supper, the peasant helps his wife in feeding the pigs and milking the cow. After that, the peasant began to make barrels for water. After sunset, everyone went to bed. Mother and father on a wide wooden bed, children on benches at walls which have covered with hay. Tomorrow morning the peasant with his family was going to getting up early again and working hard again...
The war was actually between Japan and USSR, not Russia. It was fought on land belonged to China with US and Western allies watching and supporting the Chinese govt.
Japan was the aggressor and invaded part of China bordering USSR. To protect its own interests in China, USSR fought off Japan and took over the puppet govt in Manchuria set up by Japan. It allowed USSR to spread communism to China which turned into a communist country later. US and Western allies won WWII but were alarmed to see the spreading of communism. That confrontation was the beginning of the cold war.